Ashraf El-Metwally*, Jouko J Salminen, Anssi Auvinen, Gary Macfarlane and Marja Mikkelsson
* Corresponding author: Ashraf El-Metwally a.el-metwally@abdn.ac.uk
BMC Musculoskeletal Disorders 2007, 8:46 doi:10.1186/1471-2474-8-46
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